Add Dockerfile for HuggingFace Spaces deployment

Streamlit app on port 7860 with Tesseract + Poppler system deps.
Update README frontmatter: sdk: docker.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,29 @@
+FROM python:3.11-slim
+
+# System dependencies: Tesseract OCR + Poppler (PDF rendering)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    tesseract-ocr \
+    poppler-utils \
+    libgl1 \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Install Python dependencies first (layer cache)
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# HuggingFace Spaces runs on port 7860
+EXPOSE 7860
+
+# Streamlit config: bind to 0.0.0.0:7860, disable CORS/XSRF for Spaces
+ENV STREAMLIT_SERVER_PORT=7860 \
+    STREAMLIT_SERVER_ADDRESS=0.0.0.0 \
+    STREAMLIT_SERVER_ENABLE_CORS=false \
+    STREAMLIT_SERVER_ENABLE_XSRF_PROTECTION=false \
+    STREAMLIT_BROWSER_GATHER_USAGE_STATS=false
+
+CMD ["streamlit", "run", "app.py"]

README.md

@@ -3,9 +3,7 @@ title: TenderIQ
 emoji: ⚖️
 colorFrom: blue
 colorTo: indigo
-sdk: streamlit
-sdk_version: 1.39.0
-app_file: app.py
+sdk: docker
 pinned: true
 license: agpl-3.0
 short_description: Explainable AI for Government Tender Evaluation (CRPF Hackathon)